KR100211558B1 - Control method of vibration in dehydration course of drum type washing machine - Google Patents

Abstract

The present invention solves the problem of increasing the amount of dehydration vibration when the amount is increased by compensating the influence on the amount of inertia when detecting an unbalance amount, thereby reducing the amount of vibration during dehydration of the drum washing machine to reduce the amount of dehydration vibration. It is about a method.

Conventional drum washing machine is dehydrated when the amount of vibration of the RPM (rpm) is less than a certain amount, so that the maximum amount of vibration when dehydration is frequently increased as the amount of water increases, if this occurs frequently There is a possibility of causing a problem in the life and reliability of the washing machine, and also caused a vibration / noise caused by the user to cause inconvenience to hearing.

In order to solve this problem, the present invention provides a drum washing machine including a power supply unit, a speed sensor circuit unit, a microcomputer, a motor drive unit, a variable speed motor unit, and the like. A first step of doing; A second step of accelerating up to 100 rpm in the dehydration direction CW after stopping the tub driving in the first step, and measuring a constant (100) arrival time (Ta) at this time; A third step of measuring an rpm amount of rpm (rpm) while maintaining a constant torque; A fourth step of deciding whether or not to enter the dehydration by selectively varying the dehydration entry ALPM vibration amount according to the constant 100 RPM arrival time Ta measured in the second step; If it is determined in step 4 that the dehydration can not enter (不 可) is achieved by the fifth step to stop.

Description

Vibration reduction control method when dehydrating drum washing machine

The present invention relates to a method for controlling vibration reduction when dehydrating a drum washing machine. In particular, when detecting an unbalancing amount, a dehydration vibration amount is increased by compensating the influence on the amount of inertia. The present invention relates to a method for controlling vibration reduction when dehydrating a drum washing machine to reduce the vibration amount.

As shown in FIG. 1, a conventional drum washing machine includes a power supply unit 1 for supplying driving power, a speed sensor 2 for detecting a rotation speed of a motor, and a motor rotation detected by the speed sensor 2. The speed sensor circuit unit 3 converts a signal into a corresponding motor rotation value, and is driven according to the motor rotation value output from the speed sensor circuit unit 3 by driving power supplied from the power supply unit 1. A microcomputer 4 for generating a corresponding motor driving control signal and controlling a washing stroke, and a motor driving unit for generating a variable speed motor driving control signal according to the motor driving control signal output from the microcomputer 4; 5) and a variable speed motor unit 6 for varying the speed of the motor in accordance with the variable speed motor drive control signal output from the motor driver 5.

The operation of the conventional drum washing machine configured as described above will be described with reference to FIGS. 1 to 5 as follows.

First, as shown in FIGS. 2 and 4, when controlling the amount of dehydration vibration, the motor is first driven for inflating in the reverse direction of dehydration (CCW), and the tub (TUB) connected to the motor is rotated at 50 rpm. After a short stop, next attempt is made to balance the gun while accelerating in the dehydration direction (CW).

Then, when it reaches near 100rpm (rpm), the acceleration stops, and the rotational movement with a constant torque (Torque), at this time to detect the amount of vibration vibration in order to determine the amount of unbalance in the drum tub (Max rpm-Min rpm If the amount of vibration (rpm) falls below a certain level (5 rpm), it accelerates and proceeds to dehydration. When the amount of vibration (rpm) reaches a certain level (5 rpm) or more, it stops and then restarts the above operation (CCW drive). -CW drive) is repeated.

That is, as shown in the proportional relationship between the amount of unbalance and the amount of vibration of the RPM shown in FIG. 3, the measurement of the amount of unbalance after acceleration up to 100 RPM (rpm) is rotated together with the tub and the carriage without the falling motion of the gun. This is because it is about 70 or more rpm. Since the position of the gun is variable below about 70 rpm, it is determined whether the gun is balanced in this section.

Figure 5 shows the tendency (experimental trend) of the maximum vibration amount (Tub) for each amount of the dehydration vibration amount control method as described above. In the case of large doses, testing several times results in the maximum vibration exceeding the system's rated vibration (vibration sufficient to not affect life or reliability).

In order to solve this problem, if the amount of dehydration allowance (RPM) is reduced (5 rpm), it is difficult to enter dehydration when the quantity is small, so that the dehydration entry time increases, and the frequency of error occurs because of dehydration entry within a certain time. Another problem arises, which has been increased, and the appropriate level has been decided in consideration of this.

However, such a conventional drum washing machine has a problem that the maximum vibration amount is increased frequently when dewatering as the amount of the quantity increases because the amount of vibration enters dehydration when the amount of vibration of the RPM is less than a certain amount. If so, there is a possibility that the life or reliability of the washing machine is a problem, and there is a problem that causes vibration / noise to the user, causing inconvenience to hearing.

In addition, in order to prevent such a problem mechanically, in order to improve the vibration resistance of the system should be considered in the product design, there was a problem that increases the manufacturing cost.

Accordingly, the present invention solves the problem of increasing the amount of dehydration vibration when the amount of the amount is increased by compensating the influence on the amount of inertia when detecting an unbalance amount, thereby reducing the amount of vibration during the dehydration of the drum washing machine. The purpose is to provide a control method.

Technical means of the present invention for achieving this object, in the drum washing machine provided with a power supply, a speed sensor circuit, a microcomputer, a motor drive, a variable speed motor, etc., the tub in the dewatering direction (CCW) for inflating A first step of driving (Tub); A second step of accelerating up to 100 rpm in the dehydration direction (CW) after stopping the tub driving in the first step, wherein a constant (100) arrival time (Ta) is measured; A third step of measuring an rpm amount of rpm (rpm) while maintaining a constant torque; A fourth step of determining whether or not to enter the dehydration by selectively varying the dehydration entry ALPM vibration amount according to the schedule 100 AlPM arrival time Ta measured in the second step; If it is determined in step 4 that the dehydration can not enter (不 可) is made of a fifth step to stop.

1 is a block diagram of a conventional washing machine driving unit of the present invention.

Figure 2 is a conventional Alpem pattern diagram of the dehydration vibration amount control of the present invention.

Figure 3 is an illustration of the vibration of the ALMP according to the unbalance amount of the conventional drum washing machine.

4 is a flowchart illustrating a method of controlling a dehydration vibration amount of a conventional drum washing machine.

5 is a graph showing the results of measurement of the maximum amount of vibration during dehydration and the conventional and the present invention.

6 is an operation flowchart for explaining a vibration reduction control method when dehydrating the drum washing machine according to the present invention.

Figure 7 is a curve diagram of the amount of vibration (LP unbalance) when the amount of dewatering drum washing machine according to the present invention.

8 is a characteristic diagram of the arrival time of 100 AlpM by Inertia according to the present invention.

* Explanation of symbols for main parts of the drawings

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration of the present invention is provided with a power supply unit, a speed sensor circuit unit, a microcomputer, a motor drive unit, a variable speed motor unit, and the like as shown in FIG. 1.

Referring to Figures 6 to 8 attached to the operation and effect of the present invention configured as described above are as follows.

First, as shown in FIGS. 2 and 6, the control method for reducing vibration amount initially drives the motor for inflating in the opposite direction (CCW), and the tub connected to the motor is 50 rpm. After the rotation, the motor stops for a while (S2, S3), and then attempts to balance the artillery while accelerating in the dehydration direction (CW), and further measures the arrival time Ta of 100 alpha (rpm) (S4, S5).

In the above process, when it reaches around 100 rpm, the acceleration is stopped and rotational movement is performed with a constant torque, and at this time, the amount of vibration of the RPM is detected to determine the amount of unbalance in the drum tub (Max rpm- Min rpm) (S6, S7, S8)

Accordingly, it is determined whether or not to enter the dehydration by selectively varying the dehydration entry RPM vibration amount according to the predetermined time of the measurement (100) RPM (rpm) arrival time (proportional to the quantity). (S9, S10, S11). , S12, S13)

That is, as shown in the proportional relationship diagram between the amount of gundam of 100 and the time of arrival of 100 rpm, the amount of gunfire can be determined to some extent by measuring the time of arrival of 100 rpm.

Therefore, if the amount is large (long time to reach 100 rpm), the dehydration and entry of the RPM (rpm) to reduce the amount of vibration to solve the problem of increasing the amount of vibration when the conventional amount is increased.

That is, as shown in FIG. 5, as shown in the results of conventional and present invention, the maximum amount of vibration during dewatering and dehydration.

In addition, as shown in FIG. 7, when the amount of unbalance is constant, the amount of vibration increases as the amount of vibration is reduced.

As a result, if the vibration amount of dehydration entry rpm (rpm) is constant (5 rpm), regardless of the amount of discharge, it can be seen that a very large amount of unbalance can enter dehydration when the amount is large.

In this case, it is natural that the amount of vibration increases. Therefore, in order to prevent this, the amount of dehydration is reduced by reducing the amount of oscillation dewatering entry RPM (rpm).

As described above, the present invention solves the problem of increasing the amount of dehydration vibration by increasing the amount of vibration, thereby minimizing vibration / noise and making the vibration amount almost constant (less) regardless of the amount of vibration. It is possible to effectively design, and also to improve the life and reliability of the drum washing machine.

Claims (2)

In a drum washing machine having a power supply unit, a speed sensor circuit unit, a microcomputer, a motor drive unit, a variable speed motor unit, and the like, A first step of driving the tub in the dewatering opposite direction CCW for inflating; A second step of accelerating up to 100 rpm in the dehydration direction CW after stopping the tub driving in the first step, and measuring a predetermined arrival time Ta at this time; A third step of measuring an rpm amount of rpm (rpm) while maintaining a constant torque; A fourth step of deciding whether or not to enter the dehydration by selectively varying the dehydration entry ALPM vibration amount according to the constant RMP arrival time Ta measured in the second step; And a fifth step of stopping the drum washing machine when it is determined that the dehydration entry is impossible. The method of claim 1, The fourth step compares the time to reach the constant 100 RPM measured in the second step with a predetermined first time (about 2.5 seconds) to determine the unbalance amount, and as a result, the unbalance amount Less than a predetermined first time (about 2.5 seconds) to determine, and when the amount of AlpM vibration (Max-Min) measured in the third step is less than the first selected dewatering entry amount of vibration (5 Alp (rpm)) If it is determined that the dehydration is to enter, otherwise it is determined that the dehydration is impossible to enter and stop, and the constant 100 Rpm arrival time Ta measured in the second step is compared. If it is greater than one primary time (about 2.5 seconds) and less than the second preset time (about 2.8 seconds), the amount of Al-PM vibration (Max-min) measured in the third step is less than 4 rpm (rpm) selected second. If it is, it is decided to enter dehydration. It is determined that the dehydration can not enter (정지 可) and stop, and when the above-mentioned first time (about 2.5 seconds) and greater than the second preset time (about 2.8 seconds), the Alpamp vibration measured in the third step If the amount Max-Min is less than the third selected dehydration entry ALPM vibration amount (3 AlpM), it is decided to enter dehydration. If it is larger, it is determined that dehydration entry is impossible. Vibration reduction control method when dehydrating the drum washing machine, characterized in that made.

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